Coaster-brake and hub for bicycles.



No. 769,918. PATENTED SEPT. 13, 1904. v

S. N. RAPP.

GOASTER BRAKE AND HUB FOR BICYGLES.

APPLICATION FILED MAR. 31, 1903.

N0 MODEL. 2 SHEETS-SHEET 1.

,JA TTORNE Y.

PATENTED SEPT. 13, 1904.

S. N. RAPP.

GOASTER BRAKE AND HUB FOR BIGYGLES.

APPLICATION FILED MAR. 31, 1903.

2 SHEETS-SHEET 2.

N0 MODEL.

IWY EWTOR.

WITNESSES.

.fitted with my invention.

Patented September 13, 1904.

ATENT Erica.

SAMUEL N. RAPP, OF DETROIT, MICHIGAN, ASSIGNOR OF ONE-HALF TO CHARLES GLOVER, OF NEW BRITAIN,.CONNECTICUT.

COASTER-BRAKE AND HUB FOR BICYCLES.

SPECIFICATION forming part of Letters Patent No. 769,918, dated September 13, 1904.

Application filed March 31, 1903.

To all whom it may concern.-

Be it known that I, SAMUEL N. RAPP, a citizen of the United States, residing at Detroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Coaster-Brakes and Hubs for Bicycles; and I declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification.

My invention has for its object certain new and useful improvements in a coaster-brake and hub for bicycles; and it consists of the combination of devices and appliances hereinafter described and claimed, and illustrated in the accompanying drawings, in which Figure 1 is a View in side elevation of a hub Fig. 2 is a view in section on the line 2 2, Fig. 1. Fig. 3 is a view in section on the line 3 3, Fig. 2. Fig. 4: is a detail view of the sprocket-wheel, a portion of the same being in section, showing the bolt on the inside thereof. Fig. 5 is a view in section on the line 5 5, Fig. l, looking to the right. Fig. 6 is a side elevation of the friction-shoe. Fig. 7 is a similar view from the opposite side showing the cams thereupon. Fig. 8 is an edge view of the double-faced cam. Fig. 9 is a view in elevation showing one face of the cam. Fig. 10 is a similar view showing the other face of the cam.

The purpose of my invention is to provide a coaster-brake and hub for bicycles of superior construction and utility wherein a positive lock is secured, whereby when coasting the locking device shifts through the sprocket into engagement with the brake cam or ratchet ready to set the brake, and whereby when pedaling ahead the locking device is shifted into engagement with the ratchet for propelling the wheel ahead.

My invention may be applied either to bicycles propelled by sprocket mechanism or by a chainless gear, as may be desired.

I carry out my invention as follows: In the serial No.150,420.

(N0 model.)

accompanying drawings, (0 represents the axle, and Z) the shell of the hub. The axle passes through a cup 0 and a cone (Z, said axle and cup provided with a customary ballbearing 0, as shown. The axle is also provided toward its opposite end with a cone f, having a threaded engagement therewith. The cup 0 has any suitable engagement with theadjacentendoftheshellZ). Aboutthecone f is a detachable cup 9, made detachable from the shell I) in any suitable manner. Upon the end of the axle adjacent to the cup 0 is secured a nut h. A sprocket-wheel d is shown loosely mounted upon the detachable cup 9. The sprocket-wheel is shown formed with a hub j, projecting laterally from both faces thereof, said hub being recessed in its inner periphery, as indicated at Z4, to receive a locking device or sliding bolt Z, said bolt being arranged to move laterally in said recess from side to side. Said bolt is also arranged to rock in said recess in case it should strike the high points of the ratchet teeth when it is making its shift through the sprocket-wheel to engage the cam on either side of the sprocket-wheel. A nonrevoluble cam is indicated at m on the outer side of the sprocket-wheel, said cam provided with cam surfaces or teeth a on one side thereof and with teeth 0 on the opposite side thereof. A brake-shoe p is provided, formed on one side thereof with cam surfaces or teeth q to engage the teeth n of the cam m. The shoe maybe held stationary in any suitable manner, as by an arm '1', constructed with flanges S to project astride a portion of the bicycleframe, (indicated at t.) The opposite face of the cam m, provided with teeth 0, is engaged by the sliding boltin the sprocket-wheel above described. The letter it indicates a ratchetdisk or toothed surface, the ratchet-teeth being indicated at e and made engageable by the bolt in the sprocket-wheel to propel the wheel ahead. Adjacent to the brake-shoe p is a brake-disk w, against which the brake-shoe has frictional contact when forced outward. The brake-disk has a threaded engagement upon the outer end of the adjustable cup 9, as shown, and revolves with said cup. The. inner surface of the brake-disk may be provided with any suitable facing, (not shown,)

as of fiber or leather, for example. The sprocket-wheel is provided with a spring, (indicated at 00,) bearing upon the bolt Z to keep the bolt in proper position. i

The operation of the device willnow be understood and is as follows: In propelling the bicycle the bolt Z engages the ratchet-disk to drive the hub. When it is desired to coast, the feet of the rider being held still, the bolt shifts out of engagement with the ratchet-disk u, the bolt being in position to engage the adjacent teeth of the cam on, permitting the ratchet-disk to rotate without any movement of the pedals. When it is desired to apply the brake by back pedaling, the bolt Z engages the teeth of the earn an adjacent thereto forcing said cam into engagement with the brake-shoe p, the shoe being thereby forced into frictional contact with the brake-disk w. If it is desired to apply my invention to a chainless gear, a suitable gear could be substituted for the sprocket-wheel, said gear being provided with the sliding bolt Z, said bolt being applicable to any desired driving mechanism. The teeth 0 on the cam on are formed with a short beveled surface, as shown. The ratchet-teeth 'v of the disk a are also constructed with a beveled surface. The disk u is always rotating with the wheel. When the rider ceases to propel the pedals, the disk goes ahead with the wheel, the bevel on the teeth thereby shifting the bolt through the opposite side of the sprocket-wheel ready to apply the brake. In'back pedaling when the rider starts to go ahead the sprocket-wheel is rotated, and the cam on being stationary the beveled surfaces of its teeth force the bolt to ward and into engagement with the disk n.

What I claim as my invention is v 1. In a device of the character described in combination, an axle and its hub, driving mechanism therefor comprising a carrier provided with a laterally-movable positively-engaging locking device of greater width than the thickness of said. carrier, means engageable by said locking device to propel said hub and brake mechanism engageable by said locking device. 7

2. In a device of the character described in combination, an axle and its hub, driving mechanism comprisinga carrier provided with a laterally-movable posith ely-engaging looking device of greater Width than the thickness of said carrier, means on one side of said driving mechanism engageable by said locking device to propel said hub and brake mechanism on the opposite side of said driving mechanism engageable by said locking device.

8. In a bicycle the combination of an axle, a hub, a driving device loosely mounted upon the axle provided with a laterally-movable positively-engaging bolt, said device acting as a carrier for said. bolt, said bolt being of greater width than the thickness of said carrying device, a toothed device, having a fixed engagement on one side of the driving device, a non-revoluble cam on the opposite side of the driving device engageable by said bolt, and a brake mechanism engageable by said cam.

4:. In a bicycle the combination of an axle, a hub, a driving device provided with a hub recessed on its inner periphery, a laterallymovable positively-engaging bolt in said recess, a device to propel the hub engageable by said bolt, a cam on the opposite side of the driving device engageable by said bolt, and brake mechanism engageable by said cam.

5. In a bicycle the combination of an axle, a hub, a driving device provided with a hub recessed on its inner periphery, a rockinglaterally-movable bolt in said recess, a device to propel the hub'engageable by said bolt, a cam on the opposite side of the driving device engageable by said bolt, and brake mechanism engageable by said cam.

6. In a bicycle the combination of an axle, a hub, a driving device on the axle provided with a sliding bolt, a device on one side of the driving device positively engageable by said bolt having cam-surfaces on both faces thereof, a brake-shoe adjacent to one of said camsurfaces, a brake-disk adjacent to the brakeshoe, and a device on the other side of said driving device positively engageable by said bolt to propel the hub.

7. In a bicycle the combination of an axle, a hub, a driving device on the axle provided with a positively-engaging sliding bolt, a ratchet device having cam-surfaces or teeth on both faces thereof, a brake-shoe adjacent to one of said surfaces, a brake-disk adjacent to the brake-shoe, and a device on the other side of said driving device positively engageable by said bolt to propel the hub.

In testimony whereof I sign this specification in the presence of two witnesses.

SAMUEL N. RAPP. Witnesses:

N. S. WRIGHT, J. M. POLAND. 

